Siemens SINUMERIK 828D Function Manual page 515

7. With the PLC signal:
DB21... DB32.6 (last action block active)
the PLC starts ASUB "BLOCK_SEARCH_END" via FC9.
References:
/FB1/ Function Manual, Basic Function, Basic PLC Program (P3)
8. After the end of the ASUB (can be evaluated, e.g., via M function M90 to be defined, see example for block
N1110), the PLC sets signal:
DB21, ... DBX1.6 (PLC action ended).
Alternatively, the VDI interface signal:
DB21-DB30 DBB318 Bit 0 (ASUB is stopped)
can also be scanned.
As a result, Alarm 10208 is displayed, i.e., other actions can now be performed by the operator.
9. Manual operator actions (JOG, JOG­REPOS, overstoring)
10.Continue part program with NC Start.
Y
300
200
100
0
100
Figure 9-4 Approach movement for search to block end point (target block N220)
Note
"Search to contour" with target block N220 would generate an approach movement to the
tool change point (start point of the target block).
Type 2 block search with calculation at contour
Example with automatic tool change after block search with active tool management:
1. to 3. Same as example for Type 4 block search
4. Search to contour, block number N260
5. to 10. Same as example for Type 4 block search
Basic Functions
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
K1: Mode group, channel, program operation, reset response
Approach movement
Target block N220
Approach point
(170,30)
200 300 400
Tool
change point
(450,300)
X
9.7 Block search
515